My Dad has a 2003 Pontiac Vibe AWD with the 4 speed AT. He has close to 70K miles and never changed the ATF. He started noticing it was shifting poorly and was not very responsive. He looked at the owner's manual and noticed it called for a change every 50K. So he went to a quick lube place for a machine flush. I know it's a Toyota powertrain and requires Toyota Type IV ATF. I don't know if those quick places use the right stuff or not...I have heard they used additives to modify to the manufacturer spec. Anyway, the old fluid was black, and since he had the flush, he says he runs great with perfectly smooth shifts. He wants to keep the car a long time and I just want to make sure they didn't put something in that will shorten the life of the trans. Any thoughts?